code: def test_attribute_assortativity_float(self):
      r = nx.numeric_assortativity_coefficient(self.F, "margin")
      np.testing.assert_almost_equal(r, -0.1429, decimal=4)
  
imports: import pytest
  import networkx
  from networkx.algorithms.assortativity.correlation import attribute_ac
  from .base_test import BaseTestAttributeMixing, BaseTestDegreeMixing
label_desc: Use image node_id 9 for calling the TestAttributeMixingCorrelation obj's underlying member method code with example usage: obj.test_attribute_assortativity_float() without return types